[mirror_ubuntu-jammy-kernel.git] / drivers / input / evbug.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Copyright (c) 1999-2001 Vojtech Pavlik
 */

/*
 *  Input driver event debug module - dumps all events into syslog
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/slab.h>
#include <linux/module.h>
#include <linux/input.h>
#include <linux/init.h>
#include <linux/device.h>

MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
MODULE_DESCRIPTION("Input driver event debug module");
MODULE_LICENSE("GPL");

static void evbug_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
{
	printk(KERN_DEBUG pr_fmt("Event. Dev: %s, Type: %d, Code: %d, Value: %d\n"),
	       dev_name(&handle->dev->dev), type, code, value);
}

static int evbug_connect(struct input_handler *handler, struct input_dev *dev,
			 const struct input_device_id *id)
{
	struct input_handle *handle;
	int error;

	handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
	if (!handle)
		return -ENOMEM;

	handle->dev = dev;
	handle->handler = handler;
	handle->name = "evbug";

	error = input_register_handle(handle);
	if (error)
		goto err_free_handle;

	error = input_open_device(handle);
	if (error)
		goto err_unregister_handle;

	printk(KERN_DEBUG pr_fmt("Connected device: %s (%s at %s)\n"),
	       dev_name(&dev->dev),
	       dev->name ?: "unknown",
	       dev->phys ?: "unknown");

	return 0;

 err_unregister_handle:
	input_unregister_handle(handle);
 err_free_handle:
	kfree(handle);
	return error;
}

static void evbug_disconnect(struct input_handle *handle)
{
	printk(KERN_DEBUG pr_fmt("Disconnected device: %s\n"),
	       dev_name(&handle->dev->dev));

	input_close_device(handle);
	input_unregister_handle(handle);
	kfree(handle);
}

static const struct input_device_id evbug_ids[] = {
	{ .driver_info = 1 },	/* Matches all devices */
	{ },			/* Terminating zero entry */
};

MODULE_DEVICE_TABLE(input, evbug_ids);

static struct input_handler evbug_handler = {
	.event =	evbug_event,
	.connect =	evbug_connect,
	.disconnect =	evbug_disconnect,
	.name =		"evbug",
	.id_table =	evbug_ids,
};

static int __init evbug_init(void)
{
	return input_register_handler(&evbug_handler);
}

static void __exit evbug_exit(void)
{
	input_unregister_handler(&evbug_handler);
}

module_init(evbug_init);
module_exit(evbug_exit);
Commit	Line	Data
1a59d1b8	1	// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4	2	/*
1da177e4 LT	3	* Copyright (c) 1999-2001 Vojtech Pavlik
	4	*/
	5
	6	/*
	7	* Input driver event debug module - dumps all events into syslog
	8	*/
	9
da0c4901 JP	10	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
da0c4901 JP	11
1da177e4 LT	12	#include <linux/slab.h>
	13	#include <linux/module.h>
	14	#include <linux/input.h>
	15	#include <linux/init.h>
	16	#include <linux/device.h>
	17
	18	MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
	19	MODULE_DESCRIPTION("Input driver event debug module");
	20	MODULE_LICENSE("GPL");
	21
1da177e4 LT	22	static void evbug_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
1da177e4 LT	23	{
da0c4901 JP	24	printk(KERN_DEBUG pr_fmt("Event. Dev: %s, Type: %d, Code: %d, Value: %d\n"),
da0c4901 JP	25	dev_name(&handle->dev->dev), type, code, value);
1da177e4 LT	26	}
1da177e4 LT	27
5b2a0826 DT	28	static int evbug_connect(struct input_handler handler, struct input_dev dev,
5b2a0826 DT	29	const struct input_device_id *id)
1da177e4 LT	30	{
1da177e4 LT	31	struct input_handle *handle;
5b2a0826	32	int error;
1da177e4	33
5b2a0826 DT	34	handle = kzalloc(sizeof(struct input_handle), GFP_KERNEL);
	35	if (!handle)
	36	return -ENOMEM;
1da177e4 LT	37
	38	handle->dev = dev;
	39	handle->handler = handler;
5b2a0826 DT	40	handle->name = "evbug";
	41
	42	error = input_register_handle(handle);
	43	if (error)
	44	goto err_free_handle;
1da177e4	45
5b2a0826 DT	46	error = input_open_device(handle);
	47	if (error)
	48	goto err_unregister_handle;
1da177e4	49
da0c4901 JP	50	printk(KERN_DEBUG pr_fmt("Connected device: %s (%s at %s)\n"),
	51	dev_name(&dev->dev),
	52	dev->name ?: "unknown",
	53	dev->phys ?: "unknown");
1da177e4	54
5b2a0826 DT	55	return 0;
	56
	57	err_unregister_handle:
	58	input_unregister_handle(handle);
	59	err_free_handle:
	60	kfree(handle);
	61	return error;
1da177e4 LT	62	}
	63
	64	static void evbug_disconnect(struct input_handle *handle)
	65	{
da0c4901 JP	66	printk(KERN_DEBUG pr_fmt("Disconnected device: %s\n"),
da0c4901 JP	67	dev_name(&handle->dev->dev));
1da177e4 LT	68
1da177e4 LT	69	input_close_device(handle);
5b2a0826	70	input_unregister_handle(handle);
1da177e4 LT	71	kfree(handle);
	72	}
	73
66e66118	74	static const struct input_device_id evbug_ids[] = {
1da177e4 LT	75	{ .driver_info = 1 }, /* Matches all devices */
	76	{ }, /* Terminating zero entry */
	77	};
	78
	79	MODULE_DEVICE_TABLE(input, evbug_ids);
	80
	81	static struct input_handler evbug_handler = {
	82	.event = evbug_event,
	83	.connect = evbug_connect,
	84	.disconnect = evbug_disconnect,
	85	.name = "evbug",
	86	.id_table = evbug_ids,
	87	};
	88
	89	static int __init evbug_init(void)
	90	{
4263cf0f	91	return input_register_handler(&evbug_handler);
1da177e4 LT	92	}
	93
	94	static void __exit evbug_exit(void)
	95	{
	96	input_unregister_handler(&evbug_handler);
	97	}
	98
	99	module_init(evbug_init);
	100	module_exit(evbug_exit);